【摘要】：為了探討在脫氮過程中異養(yǎng)硝化-好氧反硝化菌類之間的協(xié)同和競爭作用,以A~2/O工藝好氧污泥中篩出的三株異養(yǎng)硝化-好氧反硝化菌——XH02、XH03和FX03為研究對象,經(jīng)16S r DNA基因序列系統(tǒng)發(fā)育分析,鑒定XH02為人蒼白桿菌(Ochrobactrum sp.),XH03和FX03為假單胞菌(Pseudomonas sp.).在此基礎(chǔ)上,分別考察了單菌株和復合菌株(XH02+XH03、XH02+FX03、XH03+FX03和XH02+XH03+FX03)在異養(yǎng)硝化和好氧反硝化條件下的脫氮特性.結(jié)果表明:菌株XH02和XH03具有高效脫氮特性,在異養(yǎng)硝化過程中,第24小時對NH_4~+-N的去除率分別為90.2%和89.5%;在好氧反硝化過程中,二者在第24小時對NO_3~--N的去除率分別為91.8%和94.0%.復合菌株XH02+XH03無論在異養(yǎng)硝化還是好氧反硝化過程中,均能相互協(xié)同,促進生長,進一步提高了脫氮效率,在第24小時對NH_4~+-N和NO_3~--N的去除率分別達到97.1%和96.7%.在硝化和反硝化過程中,菌株FX03對XH02、XH03均存在著競爭關(guān)系,FX03的存在會抑制菌株XH02和XH03的生長,顯著降低脫氮效率.研究顯示,異養(yǎng)硝化-好氧反硝化菌XH02和XH03之間的協(xié)同作用可以強化廢水生物處理,提高脫氮效率.
[Abstract]:In order to investigate the synergy and competition between heterotrophic nitrification and aerobic denitrifying bacteria in the process of denitrification, three strains of heterotrophic nitrification-aerobic denitrifying bacteria, XH02,XH03 and FX03, were selected from aerobic sludge of A 鈮，

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